Remove unused variable

src/extras/geometries/ParametricGeometry.js

@@ -23,7 +23,7 @@ THREE.ParametricGeometry = function ( func, slices, stacks ) {
 	var faces = this.faces;
 	var uvs = this.faceVertexUvs[ 0 ];
 
-	var i, il, j, p;
+	var i, j, p;
 	var u, v;
 
 	var stackCount = stacks + 1;